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Simple Answer:

Mass and inertia are essentially the same thing.

Better Answer:

Inertia is a characteristic of any physical object and mass is the quantitative measure of the characteristic.

This is embodied in Newton's first law of motion. We can say this as follows.

An object in motion will resist a change in motion and a body at rest will remain at rest unless acted on by some external influence. This property of maitaining a state of motion is called inertia in physics. The external influence that can change a state of motion is a force. To say that some objects resist a change of motion more than others is to say that some objects have more inertia than others.

Fortunately, this characterization of inertia is more than qualitative. There is a precise physical measure of inertia and it is called mass.

This is contained in Newton's second law of motion. We quantify the concept of motion by defining velocity. We quantify change in motion as acceleration. We quantify mass as the ratio of the acceleration to force.

F=ma.

m=F/a.

The dramatic characteristic of the relationship is that if you quantify the mass of an object by applying twice the force, you get twice the acceleration and hence the same mass.

To be slightly more specific we must also note that force and acceleration are both vector quantities and the above relationships are valid for both magnitude and direction of force and velocity.

Note: Two comments are appropriate to be very technical. First, this explanation ignores the possible distinction between mechanical mass and gravitational mass. Secondly, the theory of relative has an equally significant understanding of mass that is not discussed here. These technical points do not invalidate the description above and may be ignored unless engaged in the most sophisticated and expert levels of discussion.

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inertia becomes greater if the mass of the object is greater.

inertia is directly proportional to the mass of the object.

Yes. Mass is what gives an object its inertia.

You cannot compare an object's size and its inertia because they have different dimensions.

The greater the mass of the object, the greater its inertia.

which has greater mass

well, the more speed the more inertia

Q: The more of this an object has the greater the objects inertia?

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inertia is the laziness of an object, or an objects resistance to change its state of motion, or how easy it is to start or stop an object. Mass is the measure of an object's inertia. Therefore with more mass, an object has more inertia.

The difference is due to inertia. Inertia is the resistance to a change in motion (acceleration). A more massive object will have greater inertia, and therefore a greater resistance to a change in motion, resulting in a slower acceleration. A less massive object has lower inertia, and therefore less of a resistance to a change in motion, resulting in a faster acceleration.

The more mass an object has, the more inertia it has. It is harder to change the motion of an object that has more mass.

Inertia is the resistance of any physical object to a change in its state of motion. It is represented numerically by an object's mass. The more mass an object has, the greater its inertia.

the greater the mass of an object, the more inertia it has, so to answer your ? yes inertia changes depending on mass :]

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The greater the mass of an object the greater it's inertia The greater the mass of an object the greater it's inertia The greater the mass of an object the greater it's inertia

An object with more momentum will have more inertia. Inertia is the ability to resist a change in force; objects with higher masses and higher speeds will have greater inertia. Speed * mass = momentum

inertia is the laziness of an object, or an objects resistance to change its state of motion, or how easy it is to start or stop an object. Mass is the measure of an object's inertia. Therefore with more mass, an object has more inertia.

The difference is due to inertia. Inertia is the resistance to a change in motion (acceleration). A more massive object will have greater inertia, and therefore a greater resistance to a change in motion, resulting in a slower acceleration. A less massive object has lower inertia, and therefore less of a resistance to a change in motion, resulting in a faster acceleration.

The more mass an object has, the more inertia it has. It is harder to change the motion of an object that has more mass.

Nothing specifically. Inertia is a proprety of matter (as you may know from the Bill Nye the Science Guy intro), and just because there is more mass to an oject doesn't really mean that it would have more inertia. However, other forces such as friction and gravity are spread over an oject, so there would be more friction due to the mass and more downwards force because of gravity + the mass.

inertia. the more mass an object has, the greater its inertia. what do you call it when an object refuses a object in motion?

Inertia is the resistance of any physical object to a change in its state of motion. It is represented numerically by an object's mass. The more mass an object has, the greater its inertia.

the greater the mass of an object, the more inertia it has, so to answer your ? yes inertia changes depending on mass :]

Whichever of them has the greater mass. Has.

Inertia is the tendency of an object to continue to move, or stay at rest, unless affected by an externalÊforce. Inertia is related to the mass of an object so objects with greater mass have more inertia.

A massive object has greater inertia. It requires more force to slow it down or change it's course. Example: It takes much more force to stop a train than it does to stop a car, only because the train has much greater mass.